Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
  • A61L9/00—Disinfection, sterilisation or deodorisation of air
  • A61L9/14—Disinfection, sterilisation or deodorisation of air using sprayed or atomised substances including air-liquid contact processes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2257/00—Components to be removed
  • B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
  • B01D2257/708—Volatile organic compounds V.O.C.'s
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2257/00—Components to be removed
  • B01D2257/90—Odorous compounds not provided for in groups B01D2257/00 - B01D2257/708

Definitions

• the invention relates to a method for reducing malodorous substances in tank tanks for heavy oil or bitumen, in which above the liquid level is a gas space with the malodorous substances, wherein active agents are introduced into the gas space, which react with or mask the malodorous substances.
• Heavy oils and liquefied bitumen are generally stored in large tank containers, which can be up to 40 m high. Depending on the degree of filling of the tank is located above the liquid level, a more or less large gas space in which volatiles evaporate from the liquid. In some cases, but not always, inert gases are introduced into this gas space, which are discharged at the upper end of the tank together with the volatile constituents. These volatile constituents consist essentially of hydrocarbons and sulfur compounds which spread a foul, irritating odor around the container. This is particularly serious when the tank is filled and the resulting increased pressure accelerates the degassing through the exhaust pipe. It is now practically impossible to remove the malodorous substances by suction in a conventional manner, since some of their constituents would condense in sticky form and thus clog the suction tubes.
• EP-A 1 772 158 describes a method for reducing malodorous substances in tank tanks for heavy oil and bitumen, in which active agents which react with the malodorous substances are introduced into the gas space above the liquid level together with an inert gas mask and thereby reduce the odor nuisance.
• the active agents are pressed into the inert gas, preferably as an aqueous emulsion in the form of fine droplets, and introduced together with this into the gas space. This rather complicated process should be improved and also extended to those tank containers in which no inert gas is introduced.
• active agents into the gas space above the liquid level, the active agents containing at least 30% by weight of an aldehyde having more than 10 carbon atoms in the molecule and a boiling point above 150 ° C. and in admixture with 20 to 95 wt.% Of a diluent can be used.
• bitumen is present as 80 to 200 ° C hot liquid, which of course promotes the evaporation of volatiles.
• the gas space above the liquid level accounts for 10 to 90% of the total volume.
• Inert inert gas can be introduced into this gas space for inerting against explosions, for example nitrogen or water vapor, the latter generally being under a pressure of 2 to 20 bar and having a temperature of 140 to 200 ° C.
• the active agents are directly in the gas space sprayed simultaneously with the inert gas, but independently of this by a separate nozzle.
• the active agents are sprayed into the gas space without simultaneously introducing an inert gas.
• the active agents can be sprayed laterally from the exhaust pipe into the gas space or directly into the exhaust pipe.
• the active agents contain at least 30 wt.% Of an aldehyde having more than 10 carbon atoms in the molecule and a boiling point of at least 150 0 C, and they are used in admixture with 20 to 95, preferably 30 to 70 wt.% Of a diluent.
• the diluent causes the active agents to be distributed very rapidly and evenly on the surface of the liquid, thus enabling their effectiveness in the headspace immediately after spraying.
• diluent is a mineral oil
• the active agents may contain naturally occurring alcohols, terpenes, ketones and carboxylic esters, each with boiling points above 150 0 C.
• a particularly preferred mixture of active agents contains: A. 30 to 60% by weight of an aldehyde, eg, alpha-hexylcinnamaldehyde, 2- (4-tert-butylbenzyl) propionaldehyde, 2-benzylheptanal, citral, 2-methylundecanal, 3- ( 4-isopropylphenyl) 2-methylpropanal or mixtures thereof, B. 10 to 40 wt.% Of an alcohol, for example linalol, eugenol, geraniol, alpha-terpineol, vanillin, thymol or mixtures thereof,
• terpene e.g. Limonene, alpha-pinene, cymene or mixtures thereof,
• ketones e.g. Benzophenone, butyl methyl ketone, 1, 6-cineole or mixtures thereof, and
• carboxylic acid ester e.g. Benzyl salicylate, amyl butyrate, ethyl butyrate, amyl acetate or mixtures thereof, wherein the percentages add up to 100.
• the active agents introduced into the gas space react there with the malodorous substances and remove them completely or at least partially from the exiting exhaust gas flow, so that the odor nuisance is largely eliminated.
• fragrant active agents can also mask the malodorous substances and mask their odor.
• 1 denotes the tank container
• 2 the heavy oil or the liquefied bitumen
• 3 the gas space above the liquid level
• 4 the outlet of the exhaust gas
• 5 the nozzle through which the active agents are sprayed into the gas space.

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• Health & Medical Sciences (AREA)
• Epidemiology (AREA)
• Life Sciences & Earth Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Treating Waste Gases (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

Country Status (7)

Families Citing this family (1)

Citations (4)

• 2007
  • 2007-12-21 DE DE102007062314A patent/DE102007062314A1/de not_active Withdrawn
• 2008
  • 2008-12-17 WO PCT/EP2008/010766 patent/WO2009083156A1/de active Application Filing
  • 2008-12-17 ES ES08867355T patent/ES2366321T3/es active Active
  • 2008-12-17 EP EP08867355A patent/EP2240210B1/de not_active Not-in-force
  • 2008-12-17 AT AT08867355T patent/ATE508757T1/de active
  • 2008-12-17 PL PL08867355T patent/PL2240210T3/pl unknown
  • 2008-12-17 DK DK08867355.3T patent/DK2240210T3/da active

Patent Citations (4)

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